US 12,029,558 B2
Time domain-based optical measurement systems and methods configured to measure absolute properties of tissue
Husam Katnani, Braintree, MA (US); Katherine Perdue, Los Angeles, CA (US); Ryan Field, Culver City, CA (US); and Isai Olvera, San Jose, CA (US)
Assigned to HI LLC, Culver City, CA (US)
Filed by HI LLC, Los Angeles, CA (US)
Filed on Feb. 16, 2021, as Appl. No. 17/176,560.
Claims priority of provisional application 63/064,688, filed on Aug. 12, 2020.
Claims priority of provisional application 63/012,538, filed on Apr. 20, 2020.
Claims priority of provisional application 62/979,866, filed on Feb. 21, 2020.
Prior Publication US 2021/0259597 A1, Aug. 26, 2021
Int. Cl. A61B 5/1455 (2006.01); A61B 5/00 (2006.01); A61B 90/00 (2016.01); A61B 90/30 (2016.01)
CPC A61B 5/14553 (2013.01) [A61B 5/6803 (2013.01); A61B 5/4088 (2013.01); A61B 2090/306 (2016.02); A61B 2090/3614 (2016.02); A61B 2562/0238 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A wearable module for use in an optical measurement system, the wearable module comprising:
a light guide configured to receive a light pulse from a light source and guide signal photons included in the light pulse toward a target within a body of a user when the wearable module is worn by the user;
at least one detector configured to detect the signal photons after the signal photons are scattered by the target when the wearable module is worn by the user;
a light diverter arranged so that, when the wearable module is worn by the user, the light diverter diverts reference photons included in the light pulse toward the at least one detector without the reference photons entering the target; and
a processing unit configured to:
determine a temporal distribution of the signal photons detected by the at least one detector;
determine a temporal distribution of the reference photons detected by the at least one detector; and
generate measurement data based on the temporal distribution of the signal photons and the temporal distribution of the reference photons.